A. that B. who
C. as D. whom
【易错】此题容易误选A，许多同学一看到题干中的such，再联系到选项中的 that，便认为这是考查such … that …句式。况且，这样理解意思也还通顺。
【分析】最佳答案为C，不是A，因为在such … that … (如此……以至……)结构中，that 引导的是结果状语从句，并且 that 在从句中不充当句子成分，若在上句填入 such … that …，句末的动词 like 缺宾语。选C的理由如下：as 用作关系代词，用以引导定语从句，修饰其前的名词 boy，同时 as 在定语从句中用作动词 like 的宾语，句意为“所有老师都喜欢的一位好男孩”。有的同学可能还会问，假若选A，能否将其后的 that 视为引导定语从句的关系代词呢？不能，因为当先行词受到 such 的修饰时，其后的定语从句应用关系代词 as 来引导，而不用that。比较下面一题，答案为A，因为 like 后有自己的宾语 him：
David is such a good boy _______ all the teachers like him.
A. that B. who
C. as D. whom
请再做以下试题（答案选D）：
It was not such a good dinner _______ she had promised us.
A. like B. that
C. which D. as
■ The buses, most of _______ were already full, were surrounded by an angry crowd.
A. that B. it
C. them D. which
【易错】容易误选 C，用 them 代指 the buses。
【分析】最佳答案是D。most of which were already full 为非限制性定语从句，修饰 the buses。类似地，以下各题也选D：
(1) His house, for _______ he paid $10, 000, is now worth $50, 000.
A. that B. it
C. them D. which
(2) Ashdown forest, through _______ we’ll be driving, isn’t a forest any longer.
A. that B. it
C. them D. which
(3) This I did at nine o’clock, after _______ I sat reading the paper.
A. that B. it
C. them D. which
类似地，以下各题选 whom，不选 them：
(4) George, with _______ I played tennis on Sundays, was a warm-hearted person.
A. that B. him
C. them D. whom
(5) Her sons, both of ______ work abroad, will come back home this summer.
A. that B. who
C. them D. whom
(6) I met the fruit-pickers, several of _______ were still university students.
A. that B. who